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The mean of the numbers obtained on thro...

The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face is:

A

`1`

B

`2`

C

`5`

D

`(8)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
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BETTER CHOICE PUBLICATION-PROBABILITY-Previous year Board.s questions for practice
  1. The mean of the numbers obtained on throwing a die having written 1 on...

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  2. If P(A)=(5)/(7),P(B)=(3)/(7) and P(AuuB)=(6)/(7), then find (i) P(An...

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  3. If P(A)=(1)/(5),P(B)=(3)/(10) and P(AnnB)=(3)/(25), then find (i) P(...

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  4. If P(A//B)=(2)/(5), 2P(A)=P(B)=(5)/(9), find (i) P(AnnB) (ii) P(Au...

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  5. If A and B are two independent events such that P(AuuB)=0.6 and P(A)=0...

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  6. If P(A)=0.5, P(AuuB)=0.7, find P(B) . Here A and B are independent eve...

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  7. If P(A)=0.2, P(AuuB)=0.5, find P(B). Here A and B are independent even...

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  8. A problem is given to three students, whose chances of solving it are ...

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  9. A problem is given to three students, whose chances of solving it are ...

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  10. Two bags contain 6 red and 4 black, 2 red and 6 black balls. One ball ...

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  11. An unbiased coin is thrown thrice. If the random variable X denotes th...

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  12. A coin is tossed 4 times. X is the number of heads observed. Find the ...

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  13. Two cards are drawn (without replacement) from a well shuffled deck of...

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  14. Four dice are thrown simultaneously. If the occurrence of 2, 4 or 6 in...

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  15. In four throws with a pair of dice, what is probability of throwing do...

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  16. Find the probability distribution of number of doublets in three throw...

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  17. A problem is given to three students whose chances of solving it are (...

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  18. A problem of mathematics is given to three students whose chances of s...

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  19. one bag contains 6 white and 5 black balls. Another bag contains 5 whi...

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  20. A bag 'A' contains 5 red and 7 blue balls, while the other bag 'B' con...

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  21. Let E and F be events with P(E)=3/5, P(F)=3/10 and P (E cap F)=1/5. Ar...

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